Inazuma swordsmith named Senko Muramasa

By completing the forging of the Holy Sword of the Stars in the Fairy Kingdom and buying the last bit of time for the girl, the individual named Sengo Muramasa finally fulfilled his mission...?
"Even if the guidance has been broken, please become the king of Teyvat."
Independent of Valhalla, she becomes an extra individual with "another personality" and embarks on the second difficult life of a woman.